ARCHIVED REPORTS_2010_11 - Laserfiche WebLink

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In the case of the -non-dedicated pump, it is towered mato the weft. and then activat - (power from the controUer box is regulated which controls the discharge rate of the h centrifugal purge pump). In the case of a well widi a dedicatedum the ne P P, p utttatic eontroUer box is connected to the dedicated pump (some wens have special high-race Purge Pumps used only for put&g,.these can be ideadfied by the fittiztgs•on the cap). A dcdicatact c tube (kept locked - the well head in a protective -bag) is attached to the discharge fitting on the casing cap. The Controller is then fumed on and adjusted to reach the desired purge rate. Note: In all cases where gasoline powered generator or compressors are used,they are to be placed at Least ten feet downwind of the well being sampled. 5• During purging,field parameters ( K electrical conductivity, turbidity, and temg ) Will be moj itored. Parameter m eats will be recorded on Purge and Sample Logs. In addition fidld observations also will be made`and reconde&on the,Purge and-Sample-- Logs. Such observations iuclude�ftow rates;-volBmepuiged;,color;odor,bubbling or-a4y-. other notable observations. An example of a Purge Characterization and Sample Lag is attached, Purging, will:continue mail-stable parameter readings are obtained. pg is considered stable if the readings do.not vary by greater than 4.1 pR unit Temperature is considered stable if it does not vary by more that one degree Celsius. Conductivity and turbidity are considered stable if they do not vmy by greater than •IQ%. Field Pandmetrrs.wil.1 be repeated at appMdulate five gallon intervals_ A.mialatum of three well volumes of water will be removed from each well. Zoic front,stable, :values will be recorded to be used in theannu.4 repo,rt, Sample Collection SaGIPles will.-be collected as soon as possible after purging is campleted. Laboratory-supplied Ca be used to hold the,waw samples. Samples to be analyzed for volatile•organic *ill be call on.the wctl, samples will be Coll -with either dedicated PUMPS or dispo=hla baffen (a new factory er will be used at each well). Li the case of dedicated pumps, the pmp rate will be adjusted so that the sampla will not be 4tated as it is collected in sample bottles. When bailers arc used, they will be towered slowly intc thewbU so aot to disturb the . The sample will be decanted into the bottles slowly with Is4S4401} 23lo A4 July 14,low Iwo xklamda.Enc.